<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像 -->
      <div class="headImg_box">
        <img src="../assets/timg.jpg" />
      </div>
      <!-- 登录表单 -->
      <el-form class="login_form" ref="loginFormRef" :model="loginForm" :rules="loginFormRules">
        <!-- 用户名 -->
        <el-form-item label-width="0px" prop="username">
          <el-input prefix-icon="el-icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item label-width="0px" prop="password">
          <el-input prefix-icon="el-icon-lock" type="password" v-model="loginForm.password"></el-input>
        </el-form-item>
        <!-- 按钮组 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 16, message: '长度在 6 到 16 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    //   移除校验结果恢复初始值
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      // 表单的预验证,使用异步方式
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        // await必须搭配async使用，可以直接获取返回的值，排除axios的其他返回值
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message({
          type: 'success',
          message: '登录成功',
          duration: 2000 // 设置弹出的延迟
        })
        // 存储token
        window.sessionStorage.setItem('token', res.data.token)
        // 路由跳转
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  // background-color: #2b4b6b;
  background-image: url('../assets/bg.jpg');
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: grey;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.headImg_box {
  width: 130px;
  height: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.btns{
    display: flex;
    justify-content: flex-end;
}
.login_form{
    position: absolute;
    bottom: 0px;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
</style>
